Embed Size (px)
Citation preview
I"/ 'eoprevr aid P oojisc-
D AUTOMOTIVE AND ARTILLERY DIVISIONS
FINAL REPORT ON
PRODUCTION ENGINEERING TEST OF XM29
WEAPON SYSTEM INSTALLED ON TRUCK,
"UTILITY, 1/4-TON, 4X4, M151
by
•" .f.•.'•lJ. DIBIASE
and
CAPTAIN H. KILLIAN
Report No. DPS-911
(AMCMS Code No. 5566.12. 53307.01.01)
(D. A. Project No. IF-5-42718-D-383)
S T i
APRIL 1963 i.MA U1963 ft
TISIA A
d Pw" qwaId
ASTIA AVAILABILITY NOTICE
U. S. Military Agencies may obtain copies of this report
directly from ASTIA. Other qualiftied ASTIA users should
request through Aberdeen Proving Ground, Md. AWTN: STEAP-D S
Destroy when no longer needed. DO NOT RETURN.
F OREIGN ANNOUNCEMENTS AND DISSEMINATION OF THIS
,PO BY ASiLA IS LIM T-• "
DEVELOPMNT AND PROOF SERVICESABERDEEN PROVING GROUND
MARYLAND
AUTHORITY: SMOTA-RPF JDiBiase/gjh
FINAL REPORT ON
PRODUCTION ENGINEERING TEST OF
XM29 WEAPON SYSTD4 INSTALLED ON
TRUCK, UTILITY, 1/4-ToN, 4X4, M151
Report No. DPS-911
Dates of Test: 30 August 1962 to 28 January 1963
ABSTRACT
After the mounting kit for the XM29 weapon system was redesigned,the system was installed on an M151 vehicle and subjected to enduranceand firing tests at Aberdeen Proving Ground. A failure occurred on theright rear helper coil spring (overload kit) during the road tests andthe generator regulator failed during firing tests. Firing limits whichyield minimal blast damage were established.
It is reconmended that a master control switch be employed betweenthe battery and regulator for use when the vehicle ignition is switchedoff during firing of the weapon; that the firing safety limits prescribedbe adopted to minimize vehicle damage; and that a higher-strength helpercoil spring be incorporated into the overload kit to minimize chances offailures in this area.
CONTENTS
PAGE
INTRODUCTION .. . . . . .. . .. .. .. . . . . .. . . 5
DESCRIPTION OF MATERIEL ................. 5
DETAILS OF TEST ...................... 8
Automotive Phase .............. ................... 8
Artillery Phase .......... ..................... 10
Observations ........... ........................ 14
CONCLUSIONS ................. ......................... 15
RECOMMENDATIONS ............ ..................... .... 15
REFERENCE ............ .......................... .... 17
APPENDIX A: CORRESPONDENCE ........ ............... ... A-1
APPENDIX B: LABORATORY REPORT ....... ............. ... B-1
APPENDIX C: PHOTOGRAPHS ......... .................. ... C-i
APPENDIX D: FIRING RECORD ......... ............... ... D-1
APPENDIX E: DISTRIBUTION .......... ................ ... E-1
ANNEX
MEMORANDUM REPORTS
(The Annex is on file in the Technical Library, APG, forreference purposes. It my be consulted there.)
TRUCK, UTILITY: 1/4 Ton, 4x4, M151With XM29 Weapon System Installed
BRAKES ...... ..................... ... Internal Expanding, HydraulicCREW ............................... Two (2)CRUISING RANGE ................ .......................... 300 V.DIMENSIONS 0/A
Length . . ........................... 158 in.Width .............. ............................. .. 75 1./2 in.Height ............ ............................... ... 66 in.
ELECTRICAL SYSTEM ............... .......................... 24 voltENGINE Four cylinder, ligu6id cooled, valve-in-head, 141.5 cu. in., 71 hp.
at 4000 rpm, 128 lb. f1t. tourgue at 1800 rpm.FUEL CAPACITY .............. ............................. 17.7 galGROW CLEARANCE ............... ........................ 9 1/8 in.STEERING .. ....................... Wormand double rollerSUSPENSION . ...... Independent, coil spring, modified for this pay1oadTIRE SIZE............................ 7.00 x 16TRANSMISSION v/TRANSFER CASE-.........14 forward speeds and 1 reverseTRANSMISSION GEAR RATIOS Gear Ratio
1 5.7:12 3.18:13 1.67:14 1:1R 7.5:1
TREADFront. . ........... ............................... 53 1/2 in.Rear .............. ............................. ... 52 in.
TURNING RADIUSRight ............. ........................... ... 16 ft. 7 in.Left ............... ............................ .. 17 ft. 2 in.
WEIGHT w/o CREWLeft front .. . ...................... 680 1bs.Right front. ......... 710 lbs.Left rear . . . . . . . . . . . . . . . . . . . . . . . . . . . 830 lbs.Right rear . . . . . . ................ . ..J0 lbs.TOTAL 3240 lbs.
Figure 1: Characteristics Photograph.
4
1. INTRODUCTION
Production models of the XM28 and XM29 (Davy Crockett) weapon systemsmounted on M151 trucks and the XM29 system secondary (support) vehicle werescheduled for endurance and firing tests in September 1962. All tests werecompleted on the XM28 system and XM29 secondary vehicle and were consideredgenerally satisfactory (Reference 1).
The previou& method of mounting and securing the 155-mm recoilless guncarriage (XM29 system) on the right rear fender of the M151 vehicle resultedin serious sheet metal cracks on the vehicle body. Testing was thereforetemporarily suspended pending design modifications to the adapter mountingkit.
The mounting base has now been redesigned so the load of the 155-mmgun is distributed on the floor of the vehicle cargo bed, and the guntravel lock is mounted on a bracket bolted to the floor of the vehiclebetween the passenger s and driver's seats.
ATAC installed the modified kit and the vehicle system was evaluatedduring endurance operations, primarily over cross-country terrain, andproof-firing tests. All tests were conducted in compliance with therevised directive from ATAC (Appendix A).
A partial report (Reference 1) has been written covering the com -pleted testing of both the XM28 system and XK29 system secondary vehicle.This report concerns only the testing of the XM29 system primary vehiclebut should be treated in conjunction with the previous report as complet-ing the test program.
2. DESCRIPTION OF MATERIEL
2.1 General
As stated in the partial report, the ?01151 vehicle used as theprime mover for the weapon system is standard. There is a rear suspen-sion overload kit incorporated on the vehicle which assists in supportingthe heavier payload (Figure 2). The kit consists of the following addi-tions and modifications:
a. Larger rubber rear suspension-arm bushings.
b. Higher-strength steel in rear suspension arms.
c. Six-bolt mounting in lieu of the standard 4-bolt mounting ofthe rear suspension arms.
5
d. One additional bump stop for each rear suspension arm.
e. An additional coil spring for each rear suspension arm, con-centric with, and inside, the standard coil spring.
Figure 2: Bottom View of Rear Suspension Overload Kit Installed onMI51 Vehicle.
2.2 XM29 Weapon System
2.2.1 Modified Mounting Kit. The modified mounting kit (Figure 3)components are shown in Table I.
Table I. Mounting Kit Components
Item Drawing No. Weight, lb
Gun mount base DTA 150868 89Bracket, rear spigot DTA 152608 6Travel lock, lower DTA 150781 64Travel lock, upper DTA 150782 25Bracket, sight 10931761 4Support assembly (spigot, rear) DTA 152594 6Frame assembly (spotting DTA 152570 6Aini tion)
6
Figure 3: Redesigned Mounting System for 155-mm Gun (,0429 System).
2.2.2 XN29 Weapon System. The following items comprise the XM29weapon system (Figure 1) runted on the M151 truck:
a. Recoilless gun, 155-mm, Xm64E2.
b. Upper carriage, 155-mm, XM121.
c. Vehicle adapter kit (ref par. 2.2.1), XM29.
2.2.3 Vehicle Adapter Kit. The adapter kit consists of the following:
a. Aiming circle.
b. Tripod, 155-mm, XQ1121.
c. Two 155-mm launching pistons.
d. Four 155-mm propellant containers.
e. Ramming staffs.
f. Fire-coatrol sight unit, XM29.
g. Aiming stakes.
h. Aiming stakes night-lighting devices.
i. One projectile, ballistic shape.
J. Mount, telescopic, XM1J7.
7
3. DETAILS OF TEST
3.1 Automotive Phase
3.1.1 Weight Distribution. Wheel loadings of the weapon system, withgun in travel position, were taken of the vehicle without crew, with driver,and with a crew of two. Weight distribution is shown in Table II.
Table II. Weight Distribution
Left Front Right Front Left Rear Right eRu' TotalWt, Total Wt, Total Wt, Total Wt, Total Wt,lb Wt, % lb Wt,% lb Wt,% lb Wt, lb
Without crew 680 21 710 21.9 830 25.6 1020 31.5 3240With driver 725 21.5 710 21.2 900 26.7 1030 30.6 3365With two Crewmen 735 20.6 795 22.3 895 25.1 1140 32.0 3565
Per Cent of Total WeightPosition Without Crew With Driver With Two Qrewen
Front wheels 42.9 42.7 42.9Rear wheels 57.1 57.3 57.1Left side 46.6 48.2 45.7Right side 53.4 51.8 54.3
3.1.2 Endurance Operations.
3.1.2.1 Final Operations Suimary. Table III shows the total mileageaccumulated during endurance operations.
Table III. Summry of Operations
Course Miles
Paved highway 170Belgian block 108Level cross-country 2420
Total 2698
3.1.2.2 Defects. Defects are as follows:
a. A crack developed on the right top side of the rear body-panel cutout adjacent to the radius and extended 2 inchesdown the rear side of the panel (Figure 4).
8
b. At test mileage 2093, the right rear helper coil spring(overload suspension kit) was found broken in two places(Figure 5). This spring is almost directly under the gunmount. The failed piece was analyzed and it was foundthat the surface of the spring adjacent to the crack hadsuffered fatigue failure, and was not carburized in thisarea (Appendix B). It is difficult, however, to determineexactly how much this condition contributed to the failureand it must be realized that this area is definitely over-loaded.
Figure 4: Condition of Fatigue Figure 5: Failed HelperCrack in Rear Body-Panel on Completion Coil Spring.of Test.
c. After test firing round No. 6, while attempting toestablish safe firing limits, it was found that thecutout relay breaker points on the generator regulatorassembly had fuzed. This condition resulted in a deadbattery and burned generator-coimutator bars. Whetherthe points were jarred together from the blast effectsof firing, or not, is indeterminable. However, if thesystem were equipped with a master control switch fromthe battery to the regulator, all possibility of damageof this nature would be eliminated by cutting off bat-tery current when the engine ignition is switched off.
d. After firing round No. 26, the four support rods whichanchor the in-tank electrical fuel pump and filterassembly were found pulled loose from the cover flangeto which they are riveted (Figure 6). This failure ispartially due to the shock and vibration encounteredduring cross-country operation.
9
Figure 6: In-Tank Electrical Fuel Pump Failure.
3.2 Artillery Phase
3.2.1 Blast Effects on the Vehicle and on Stability.
3.2.1.1 General. Firings consisted of 50 excess-pressure (115%)rounds with 16.9-pound charges of propellant, M5, MP, 0. 040-inch web,lot HPC-13245, fired for blast effects from XM64E2 gun No. 154,. mountedon the truck, utility, 1/4-ton, M4151. These rounds were fired usinginternal slugs (dwg No. FB 51480). Excess-pressure charges were usedto achieve the highest chamber pressure conditions and, consequently,blast pressures exceeding any that may be encountered in the field.Six 37-mm spotting rounds were also fired to determine any possibledamage to the vehicle as a result of spotting-gun muzzle blast. Twoof these rounds were fired from X477El spotter No. 13 to proof the gun.The remaining four rounds were fired from XM77El spotting gun No. 26.
3.2.'.. 2 Preparation for Firing. The vehicle was prepared for firing
by removing from the truck the following items needed to fireone round:
a. One launching piston.
b. One propelling charge.
c. One porta pack containing one projectile.
d. Sight unit, consisting of telescope mount, XM17'7, andelbow telescope, XM107.
e. Aiming stakes and aiming circle.
10
In addition to these items, the windshield was removed from the vehicle toprevent damage by blast or displacement of stones and debris resulting fromreflected backblast. The tripod, ground mount, XMI21 was also removed topermit free access to the sight unit when mounted on, the sight bracket.
A hill composed of bank gravel was constructed for slope firingsand the vehiclg was positioned at various cants on the slope (Appendix C)..
3.2.1. 3 Facilities and Materials. The following facilities and materialswere used to record data:
a. Motion picture cameras, 128 fps, to obtain an over-all viewof vehicular stability.
b. Still camera for photographs of vehicle before and after eachround.
c. Sight unit consisting of telescope mount., XM177, and elbowtelescope, XM107, to determine tube throw-off after firingeach round.
3.2.1.4 Traverse Measurements. Traverse was measured from 0 mil (gunparallel to the longitudinal axis of the vehicle, muzzle forward) with thegun as mounted on the vehicle (Figure 7).
I
/\
Figure 7: Definition of Direction of Traverse.
3l
3.2.1.5 Results. A summary of the results of this phase follows:
a. The M151 vehicle appeared satisfactory as a firing platformfor the XM29 weapon system. Although failures of mechanicalcomponents, i.e., the voltage regulator and the fuel pump,occurred during firing (ref par. 3.1. 2.2), they cannot bedirectly attributed to blast damage as a result of firing.The vehicle also exhibited satisfactory stability.
b. Depending on gun orientation, the user must expect vehicledamage from the blast effects on the sheet metal body ofthe vehicle from repeated firings. It should be noted thatthe XM64E2, 155-mn recoilless gun is a high-trajectory weapon,producing relatively high levels of reflected backblastpressures from the ground.
c. Blast pressure from the XM64E2 recoilless weapon has littleor no effect on the chassis and engine assembly of the M151vehicle. However, the body assembly will fatigue after ithas been subjected to repeated firings. No significantdamage to the on-vehicle equipment was observed.
d. Each gun position fired during this test simulated the worstconditions that could be expected under field conditions, andsheet-metal fatigue was undoubtedly accelerated over thatresulting from normal use in the field. Photographs of theblast effects test are contained in Appendix C. It is recom-"mended that the weapon be fired in the general area shown inFigure 8 with the precaution stated in paragraph 3.2.1.6.When firing at all elevations, the nozzle area between thetwo extremes (Figure 8) will afford traverse positions (620mils right traverse, 2040 mils left traverse) that willminimize muzzle or nozzle-blast damage to the Vehicle. Asnoted in the round-by-round data (Appendix D), gun throw-off as a result of firing was small and can be easily com-pensated for at all elevations between 178 mils and 800 mils.
e. Tramel-point measurements of the XM21 mount and vehicle weretaken during previous firings conducted on the XM29 system.With the weapon as presently mounted, no measurable deforma-tion of the body of the vehicle was expected. Therefore, itwas not deemed necessary to repeat trawmnel-point measurementsduring this test.
3.2.1.6 Discussion. The recommended elevation limits are referenced tolevel ground. When firing within the recommended positions, the windshieldand projectil. porta-pack should be removed as precautionary measures. Toobtain right traverse it is also necessary to remove the ground tripod fromthe rear of the vehicle to increase accessibility of the sight unit. Shouldthe recommended firing positions be exceeded, it is suggested that all on-vehicle equipment be removed.
12
Figure 8: A Recommended Position for Firing.
In addition to precautions unique to firing from a vehicle,the general precautions for firing the weapon should be observed. Per-sonnel should take a position to the side of the weapon and as distantfrom the vehicle as the extended-firing cord, low-energy detonating cord(LEDC), will permit. This distance is not constant. The cord may haveslack left in it but, to minimize malfunctions, it should not overlapitself. It will not be capable of maximum extension at low temperaturesbecause of stiffness of the coiled length. When firing, the face shouldbe turned away to avoid any possibility of injury from flying particlesof LEDC. All personnel should position themselves so they are no morevulnerable to injury from the LEDC than the one who initiates it.
Heeding these precautions should prevent all but minimum damageto the vehicle. However, the user should expect a high mortality rate onvehicle hoods because of backblast damage. If there is a slight deviationfrom the recommended procedures, it is probable that only minor damage would
result. However, if the suggested maximum and minimum elevation and traverselimits were exceeded in firing one round (as in an emergency) the vehiclecould suffer severe body damage although it might noL be disabled.
The nozzle should never be so positioned that the center lineis closer than 18 inches from the side of the vehicle.
The minimum elevation for firing the weapon over the hood ofthe vehicle is 178 mils.
13
3.3 Observations
The vision of the driver to his immediate right is hampered exceed-ingly by the position of the gun in travel-lock position. A passengershould always accompany the driver even if it be solely for safety purposes.
The travel-lock locking handle is situated in such a position thatoperation on rough roads could result in head injuries to the passenger(Figure 9). This can be remedied by rotating the handle up and away fromthe passenger.
The locking pin on the travel lock (top section to base) was tooshort and the indent balls did not effectively lock the sections.
S
bFigure 9: Hazardous Location of Travel-Lock Locking Handle.
The adapter kit was assembled by two men in 12 hours, or 24 man-hours. The tools necessary for complete installation on the vehicle arereadily available in third echelon tool kits. Problems were encounteredin the assembly of the kit to the vehicle due to chassis design and loca-tion of the channel members on the underside of the cargo body. Assemblywould be extremely difficult with arctic handgear. No difficulty wasencountered at any time in loading the weapon other than the normal problemsof handling muzzle-loaded weapon.
14
4. CONCLUSIONS
It is concluded that:
a. The adapter kit for mounting the XM29 weapon system to the M151vehicle is adequate for 2000 miles of vehicle cross-countryoperation and weapon firing provided higher-strength helper coilsprings are incorporated in the overload suspension kit (refpar. 3.1).
b. The M1151 is a stable firing platform for the XM29 system (ref par.3.2.1.5).
c. Depending on gun orientation, the user can expect vehicle damage;Fm the effects of repeated firing. This damage should not im-mobilize the vehicle (ref par. 3.2.1.5).
d. Minimum damage will be imposed on the vehicle when the weapon isfired within prescribed safety limits (ref par. 3.2.1.5).
5. RECOMMENDATIONS
It is recommended that:
a. A higher-strength helper coil spring be incorporated into the over-load kit to minimize chances of fatigue failures and breakdown.
b. A master control switch be employed between the battery and regu-lator for use when the vehicle ignition is switched to off duringfiring of the weapon.
c. The elevation and traverse firing limits outlined in this reportbe adopted to minimize damage to the vehicle.
d. The M151 vehicle be considered a stable firing platform for theXM29 weapon system.
15
SUBMITTED ::
TDIBIASE LANTest Director pt, Ord CorpsTeses Dirrector
REVIEWED:
E. MOLNAR W. A. GROSS,Acting Chief, Wheeled Chief, AutomotiveVehicle Branch Division
J. D. FARRELL . LActing Chief, Mortar Chief, Artilleryand Recoilless Rifle Branch Division
APPROVED:
Deputy Director forEngineering TestingDevelopment and Proof Services
16
REFERENCE
1. Gilkey, J. ; Killian, H. "First Partial Report on ProductionEngineering Test of XM28 and XM29 Weapon Systems Installedon Truck, Utility, 1/4-Ton, 4x4, M151." Aberdeen ProvingGround. Report No. DPS-775, January 1963.
1
17
APPE•DIICES
PAGE
CORRESPONDENCE . . . . ... . . .......... . ..... A-i
IABORATORY REPORT .................. B-I
PHOTOGRAPHS . C-I
FIRING RECORD ................................... D-I
DISTIBUTION. .................. ..................... E-i
COPY/cj APPENDIX A
Correspondence
TEST DIRECTIVE
1. OBJECT: Evaluation of X1428 and X)M29 weapon systems installed on truck,utility, 1-/7-ton; 4x4, M•51.
2. INTRODUCTION: Kits are being fabricated by Ordnance Tank-AutomotiveCommand to mount .the XM8 and WQ29 weapons to the M151 vehicle. Engineeringtests are r'equired to d~termine the adequacy of the installations prior to re-lease of the equipment for production. Testing is required in the followingareas:
a. Vehicle performance with the increased and redistributed loads.
b. Vehicle stability as affected by firing of the weapon.
c.- Stability of stowed components.
d. Effects of muzzle and reflected back blast upon the vehicle andstowed equipment.
3. ENGINEERING TESTS AND EVALUATION:
a. Testing
(1) Durability: Testing and evaluation shall consist ofdetermining satisfactory performance of the equipment without malfunction.Subsequent to and during testing, investigation be conducted to reveal con-ditions of premature failure.
(2) Vehicle Evaluation: Vehicle testing and evaluation shall belimited to that which is required to determine the acceptability of the weaponsystem installation and the possibility of adverse conditions being imposedupon the vehicle body and chassis.
(3) Vehicle Stability: The vehicle chassis shall be instrumentedto measure displacement vs time during and immediately after projectile launch-ing. Measurements shall be taken while firing five (5) rounds at each positionof azimuth and elevation.
(4) Vehicle Performance: A mobility test shall be conducted toevaluate performance of the vehicles over the following types of terrain:
Miles Type Course Location
100 Gravel Munson150 Cross Country (Hilly) Churchill100 Cross Country (Level) Perryman
50 Marsh-Swamp-Woods Munson50 Belgian Block Munson50 Paved Road .To and from courses
A-1
COPY/cjz
(5) Blast Damage Assessmentc Onc hundred (100) test slugs andfifty (50) subcalib•r vo-nds shall be fired from the vehicles. Weapons shall.be fired from various azimuth positions and maximum and minimum elevation. Fifty
(50) XM28 slugs and fifty (50) XM29 slugs with propellant cartridges, twenty-five(25) XM28 and twenty-five (25) XM29 spotting rounds will be provided by APG.Vehicles shall be fully stowed during this operation.
(6) Acceleration of Stowed Projectiles: Measurements shall berecorded with projectiles mounted in M151 vehicles.
4. TEST PLAN: The preparation of a test plan by Aberdeen Proving Ground,D&US, shall include all detailed requirements essential for the proper testingand evaluation of the equipment. The formal test plan shall be forwarded forconcurrence of this Command.
5. TEST PERIOD: Prototype testing shall commence on or about 27 August1962 and will be completed prior to 5 October 1962.
6. MODIFICATION OF EQL1I!: No modifications to test items will be per-mitted without concurrence of the project officer, OTAC, or his authorizedrepresentative.
7. PHOTOGRAPHY:
a. Still photographs shall be taken of the following:
(1) All vehicle and component failures and corrective repairs.
(2) General photographs of the front, top, sides, and rear views.
b. Movies shall be taken of firing preparation, firing, and firingeffects.
8. REPORTS: Upon coimmencement of testing, monthly memorandum reports anda final report will be required.
9. DISTRIBUTION OF REPORiS: Two copies of each report (Item 8) shall be
forwarded to the following:
a. Ordnance Tank-Automotive Command.
b. Ordnance Weapons Command.
c. Picatinny Arsenal.
d. Frankford Arsenal.
e. Watervliet Arsenal.
f. Ordnance Ammunition Command, ATTN: XM28 - XM29 Project Officer.
A-2
COPY/cjz
10. CLASSIFICATION: Reports shall be unclassified where possible.
11. PRIORITY: A priority of 1A should be assigned to this test. Ifsuch a priority cannot be assigned, it is requested that this Comlazd be sonotified.
12. EQUIRMENT: Provisions of all XM28 and XM29 weapon system equipment,including vehicles, shall be arranged by OrAC.
13. VEHICIE CHARACTERISTICS: The following characteristics shall bedetermined: Gross weight; weight distribution; over-all dimensions; center ofgravity; any safety devices required, minimum safe elevation and traversecondition.
A-3
.DKew/kc/20240S ..... .. ... •, j ~WORK ORDER ,.. .. ., €,,.I.,
I Ij 3 Aug 62a. TO N Ic., Commanding General r e & Engr Directorate I. o~ s CODE
Aberdeen Proving Grd ATAC, SMOTA-RPF 550.12.533GO.03,01*.*I'. ODS TITLE 7. AUTm. RATE e. OtF. cost 9. List iTEM INDICATOR
APC Application 2215 B*
10, PitON. MR 1I. ACCOUNTIN4 CLASSIFICATION Of FUON l (TO ad) MADE AVAILAWI.
4UT VT L. . . 0 cm I ma A, a
1413 11R129!0 24 fON 2lx2O40a-.W*3663409"P5530-***-18.001it. pitOIcacil 11 Tag F1OLLO.1110 .m.. II AuTIMr4a I dim ISV&J1CT TO AVAILAGILITV Of FUNDS)
APC Appl ication*******
JOB 63-1!TProgram Authority is provided for testing the XM28 & XK29 Adaption Kits
installed on Truck, Utility, 1/4 Ton, 4Ax, M151 in accordance with Test Plan sub-mitted by APG/D&PS, subjs XM28 & XM29 Weapons Systems Installed on Truck, Utflity:1/4 Ton, 4x4, MIS1.
2. Estimated time of performances A. Starts 27 August 1962B. Complete$ 5 October 1962
3. Project Engineers Mr. A. Pacholski, SMOTA-REC.2, Ext. 3-4114.
13. QUANTITATIVE AND CHANG DATA
a- ELEMNTS b. U/N c. OTY (Units) d. UIIT PRICE e. Total Cost
PriorIncrease N/A 000,000 000,000.000Dec rease
Current .N/A 000,000 '000,000.000Tol erance Nona
14. TAAGtTaT 1OR4T OBsLIG ATION
22815. DISTRIBUTION DATA II INV. M".
DOC. M STOCK OR PART NUMSER QUANTMITY DOCUMENT NUMIPaER SUPPL. FWD DIST PROJ. RNEW'O UNIT PRICE__III __U t_ DEL. M,, DOLLARS CT$
IDENT & FSC FIIN ADT*L'. AiO*ER DATE SERIAL. (. .DORES TION DATE A
5+- 0., 71 UTATT
00a 0 0 0 0 0 0
OTT 0 D O 0 P 0 P
10 0 0 0 0 0 0
17. AUTHORIZEO 11Y I TYPE9 NAME TI.4) E.,
R. FREEMAN R9. nEEMAN ''hff Proram OfficeIt. INLOSUmRES
None.
ADS A0_4.-*T AC- wtroit
20 APR 1962 20 A-4-CA-Deri
DKewl vts /2024 0PAWORK ORDER 1. ;ATE.PR PARIS 2. 60CUNE PI ORT Y
_ _ _ 29 Au62 993. TO 4. ,,oR . RI B24 5. Ols coc
Commanding General Res & Engr DirectorateAPG, I&PS ATAC, SMOTA-RPF .4S 5530.12.533G0,02.01
. 041S T I YL 7. AUTM. DATI a. MPT, COD I. LIN( I Y iiNl&OCA TOl
AP XK28 XM29/)Q51 2241 B N
Fl Pow, No II, ACCOUNTImN ¢LASIIPiCATION Of FUNDS R TO CIa MAD$ AVAILASLi
C ̀U..T I .... rIT AL . A.. . ........ 1 ..... U .... E14 3 _ o.R129 .02'. 124 2, D2'""O
Ii. PC RFOMANCE 01A TYNE FOLLOVIN" lolE I AUT4ORI0 1ED ISU$IJ CT TO AVAILASILITY Of FUNIS)
APC XM28 D•29/MlSl
This amendment is issued to provide additional program authority for the followingand to change the (CM4 Code .in Block 5 of the basic document from 5530.12°533G0.03.01to 5530.12o533G0o.02.01 as indicated above.
Job 63-1. Amendment 11. The basic order is amended to include the procurement of twenty-five (25)
major caliber rounds using prototype pistons and external slugs to replace twenty-five(25) major caliber rounds using internal slugs.
2. The purpose of this procurement is to subject the gun to the actual firingconditions in order to evaluate the merits of the elevation lock on the XK131 Mount..
3. Target Completion Date: One (1) Month from receipt of this authorization.4. All other teims and conditions remain in effect.
13, QUANTITATIVE AND CHANGE DATA
a. ELEMENTS b. Ul/M c. TY (Units) d. UNIT-PRICE e. Total Cost
Prior NA 00,000 000,00000Ir rease NA 00,000 000,000,00Dec reaseCurrent NA 00,000 000,000.00Tolerance 'None
14. TARGE? &AT[ FOR ,OLISAYINo Type of Buy2274- - . ...
25. DISTRIBUTION DATA Rr INV. MFR.
DOC. N STOCK OR PART NUaMBER QUANTITY DOCUMENT NUMBER SUPPL. FND DIST PROJ . REO5 0 UNIT PRICEDENT A FSC FIIN AD T'L RE OER DATE SERIAL 4 ADDRESS 01RI1 _ D TEL. 8
U.- "X?; • TION -O DATE __ • u• 8 DLL S CT
I-~ >
16. DESIRED DELIVERY SCHEDULE. . . . . . . . ............ ........ . . . . . . . ................................................................................
ENTER D o D 0
0 ATE l D DATE
T IQ 0 Q a O 0
C ITY O 0 D D O D
17. AUTHORIZED BY T ED AE 6 TITLE
R. A. McDONALD TypA T
R. A McDN~lD. RI A0 MDONALD, ýActlg Ch, F~inancial Con~troIt. INCLOSURES A C
AoS A5 AIITAC- Detroit20 APR 1962 20
DAME 8 OCT62?*N4U.Al fAC11C45 ACTIONs D&03
hPP R L~PAP
DE RL-CMtLL 140
P A
ill CCUSATKAUTMVCOtID CLNTiRLINI ?IICM
TO RýEPAP i CGAiE.RD)E.NPGD MD
11-10 RUCflRK/GGUSAWPNSCOflD R0CKIS ILL
RUCAKJl/COPiiL5LSAINFRD FT BLNNING CA
.DA GBNG
UNGLAS TTw~ FOR ASTELDps-T N ieGZLCYtD MR LLYIEViE. A?G
)OR AMCPli-DC,q LT COL ROD=LS AND KR 9 Le LLNJZ USARWCj FOR MlAJOR TIPP
USAIR, FROM $t1OTA-'RLC.*S, A#L. PACHOLSKI p SGD Lo So LUDWIG
CONFIRMIING TLLLCON 21TNELN KB. GILKLTs APG, A10 MR * FACHOLSKIpI
ATAC; IT IS RLQUL$UED THAT ALL TISTINGe RXPLAT, ALL TESTING Or THEL
Z?1 29 KIT INSTALLED ON THEk M1 FRI3IARY VEHICLL ONLY BE SUSPENDED
UNTIL FLBTLR NOTICE. TLST AT FORT LNI4ING RJEVEALED DEFICIENCIES
SGhINJ1CANT IN h1AClITLPL TO WARRANT NODIFICATION AND/OR REDESIGN
Or THIS KIT INSTALLATILON
AT
CTN TT &4% AMSTL-DPS4TU AJICPfl-DC USAIR StIOTA -RLC*2 M0~ ?I16
412ýa~z RucKLE
A.-6
"LKew/is/,o20240"PRAW ° "A I F PAGES O"T° " "PAIO A . ° PRio? .... IT
1 WORK ORDR 13 Dec 62. 9983. TO . FRO'M RI EH S. IS CODE
Commanding General Res & Engr DirectorateAhard-ama Prnrino 4,rjni ATAC. SOTA-RRP,4 OMS 5566.12.53307o010C-.
*. OMS TITL 1 7. RUTH. DAT| S. aPT. CODl E. LIPS
APO XM28 XM29 2347 B NIO. PROM. MR II. ACCOUNTINi CLASSIPICATION OF FUlDS (TO It) MtAD AVAILAILE
MJ I 3 1R1291 04 EEH-IKI 2lx2040-***-3663409-P5566***-18-0011I. PCSFO WANCI OF THE POLLOIINGO OAK I u &U aNOi| IUBJiECT TO AVAIL AIILITY OF FUNDS)
APC XM28 XY29/MI51
1. This amendment is issued to revise the AMS Code From 5530.12.533GO.02.01 to5566.12.53307.01.01.
2. All other instructions remain unchanged.
13. QUAJNTITATIVE AND CHANGE DATA
a. ELEMENTS b. U/M c. (TY (units) d. UNIT PRICE e. Total Cost
x Prior NA 00,000 000,000.00I nc reaseDecreaseCurrent NA 00,000 000,000.00Tolerance
14. TRISlG OAT FOR OI I. Rype or Buy2319 215. DISTRIBUTION IAT-A 2 T INV. -11".
DOC. S STOO( OR PART NUMBER QUANTITY DOCUMENT NUMSER SUPPL. FND DIST PROJ>. REO 0 w UNIT PR 7EIDENTJAI- OTL. '.O4u DOLLARS CTS
DENT & FSC FIIN NEOTWLow REQER DATE SERIAL x ADORESS TION • DATE V D
16. DESIRED DE{LIVERY SCHEDULE; ,;• ] . . . . . . . : ............... ...... .. . . . ., . . ........... J ,................ ................ ............... ..E. .... E..... .............. SCE-E.....................
DATE
0 AoR 12 A-7 ItWTYPEDTNAMEDAtTIit2AOS A-7 • Arwy.-OT"AC- Detroit
DATEJ 28 Doe 62ACTION t D & PS
NNNHE'l.0,97INFO: CORUT
NVE RLICKIEL
FII CGHQ1?SATKPTTIIVCEW Cr.KTXRLZNK 3ICH
TO CU"5DEELI4ED HD
DA RtJC
IT
"!%CLAS TV'I0U MOR AMSTL-Df-LT!.- Me Lo 11AflPk FROMI ZtOTA-RCIF*2
MR! A* PACIIOL~stt GsD be, jo ?U3RZTT
is IT Is AtREoiEsTED THAT ql ADD)ITIONAL N IIIE"; Of A!TTOMOTXVE
TEST. BE PERIORlt&D ON T_1 t'i ý4i TONo Kl~ol WITi: MI~S) WEAPON. -T3TEM.
INSTA?.LED. S!'fTICUNT ARt:;ML AVAILABlX FOR THi Tiz':".TA THEABV
TXST.:7 UWEL PZSCuSSLD WITH H 'IARPE2R AND Jo DI BIfA2Z, APG
AND A' XACXlOL.&Kl, OTAC.
'.FURTIER RkQVjEST PUAT Tj'i.C* OFFICI_ SE INFORMEID Of THE TEsT1-
PROGRkZ..s 9T rir.lP;NEw
ST
QFIN TT31ý4ed. AN1ZTEDPS'T! $HTA-RCY92 I ~-'1"Nl~l XJý
A-8
PMICAL 7ST LAMATUM
• .L~ CAL. _..IATICN MPI Roort NO - 63-P-i3.
he Overload irizng from the sheet 1 of 2MC9 Vspon eftvtm *uteed cn Tck,utilitq, j Ta, 4 X 4I, N051. Date of Test ..- 24 ion 1.963
QhUC! SE ýM~ATXC: Report Ccsplee JO1 16
To determine the ae of 0on.cted for )r, J. Dlii._failure of the overloa spring.
Qel Vehc', Dr., &Ao. Div.
CM Code 556.=.;jP.01.03.One failed overload spring vas
submitted to this laboratory for w.0. No. 323.-304-30metalorgi aluti~re analysais. The
spring (uhich vas overloaded) broke Referances Ordnance Corjpsat tw points uppudmtev tw coilsapart. Dwaving upe miat"ios require Dwg No 10218a cbrwu-vaitm vaLye sIMquallit steel, heat treated to aharaiee of k.6-51 Jbockwall "C" ad dwt Peased.
72ST PROCEM:
1. A close visual exaalnation va made of the spring including bothfracture faces.
2. A speclmen, adjace•t to the origin of failure, vas rewvd fromthe apring and piupered for netalllagrqic examination.
3. Hardness x-v' ere made of the overload spring. All readingswere recorded on the Rockvell "C" hardness scale.
RESLTS:
1. Visual eaxwnintion of the fractire faoes revealed slight traces ofa fatigue pattem. It appears that fracture originated in fatigue andquickly propagated into a brittle failure.
2. - .croemination of the strucbture of the material revealed ahardened steel with some decartu-ization of the surface.
TAP-DS-LP Rqxot No. 63-P-13Sheet 2 of 2
3. The har& se suz-M con&xcted upon the material revealed ahardness of Aockwvll "C" 9-5l.
1. Microexuuination of the material revesled a decrixrized surfacelayer. The carbon loss vas znt excessive but wa d•tLrimenta to thematerial's fatigue resistace. Regardless of the carbon content or strengthof the u•derlying mrtal, te fatigue resiutance of the spring wxad beinlumnced lb the lov fatigue struagth of the decarbirized surface layer.
2. * Uaress ourvem conducted upo the material revealed a hardness%blab is near the mwxdJum all Wble bardDu for alloy steel springs. Springspossessing ouch a hig bardnwo are susceptible to notch failures.
3. St peening of decerbuzried airfaces of steel springs Is dotrimentalrathe" than benficial to the perfor'wee of the spring. The shot peningof the decarbirized surface produces larger than normal indentations ihchco-uld revult in notch failures.
COCIAUC1M:
It is concluded that failure of the spring is attributahle to an over-loeaed testing ceonition iddoh initiated a mall crack in the decarburizedsurface laVer that quickly propated into frawure of the brittle material.Te deficiencies may have singularly or collectively contributed to failureof the spring.
J. TBNEDTT
Fadiogrephic & Metallurgical Section
REVIEWED: APPROVED:
R., L. HLMEC.ST" /J. M. KMEChief I ChiefRadiogrephic & Metallurgical Section Pbysical Test Laboratory
B -2
APPENDIX C
s18-ool-56"2-T/ORD-0'3: After Firing Round No. 1 at 80 Mils Elevation,1600 Mils Left Traverse.
C-1
S18-OO1-563-T/ORD-063: Before Firing Round No. 2 at 800 Mils Elevation,1600 Mils Left Traverse.
C-2
sl8-coO1-561i.-T/ORD-063: After Firing Round No. 3 at 800 Mils Elevation,2670 Mils Left Traverse.
C -3
mit
S18-O01-569-T/ORD-63: Right Front Fender Showing Action of ShockAbsorber against Fender after Round No. 3.
C-4
S18-.OO1-567-T/ORD.63: Front View before Firing Round No. 4 at 800Mils Elevation, 2400 Mils Left Traverse.
C-5
S18 OO -5~ -T OBD~ 5 : A te Fiin B und No 5 t 0 M ls Ele at on
2311 Mils Left Traverse.
c-6
SiaOO2 5 7T/OD3 After Firing BRo-un NO. 0 at 45 Mil.s ElevatiOn,
2400 Mils Left T3raverse.
C -7
..... ..
S18-OO1-573>T/ORD-63: After Firing Round No. 7 at 50 Mils Elevation,2220 Mils Lef't Traverse.
c-8
I SI
S18-OO1-572-T/ORD-63: Before Firing Rouand No. 8'at 44+5 Mils Eleva-tion, 2311 Mils Left Traverse.
C -9
S18-OO1-574-T/ORD-63: After Firing Round No. 9 at 445 Mils Eleva-
tion, 2400 Mils Left Traverse.
C-10
Sl8-ool-607-T/ORD-63: Before Firing Round No. 11 at 800 Mils Eleva-tion, 987 Mils Left Traverse.
C -LI
s18-ool-605-T/ORD-63: Bef~ore Firing Round No. 12 at 800 Mils Eleva-
tion at 533 Mils Left Traverse.
C -12
.' II
s18-ooi-602+-T/ORD-63: Before Firing Round No. 14 at 800 MIils Eleva-tion, J444 Mils Right Traverse.
C-1 3
...... .....
S18-OO1-595-T/ORD-03: Before Firing Round No. 15 at 800 Mils Eleva-tion, 620 Mils Right Traverse.
c-~14.
S18-OO1-598-T/ORD-63: Before Firing Rounds No. 17 at 23 Mils Eleva-
tion, 620 Mils Right Traverse.
C-15
sl8-oo1-602-T/ORD-63: Before Firing Round No. 18 at 445 Mils Eleva-
tion, 533 Mils Left Traverse.
c-16
s18-oo1-6oi-T/ORD-63: Before Firin~g Round 19 at 445 Mils Elevation,
o Mil Traverse.
C -17
Ff
S18-OO1-599-T/OPD-63: Before Pound No. 20 at 178 Mils Elevation at0 Mil Traverse.
c -18
S18-OO1-597-T/ORD-63: Before Firing Round No. 21 at 178 Mils Eleva-tion, 533 Mils Left Traverse.
C -19
S18-OO1-596-T/ORD-63: After Firing Round No. 22.at 55 Mils Eleva-
tion, 2400 Mils Left Traverse.
C-20
.4
sl8-ool-575-T/ORD-63: Af~ter Firing Round No. 28 at 178 Mils Eleva-tion, 2311 Mils Left Traverse Ascending a 150 Slope.
C-21
S18-OO1-577-T/ORD-63: After Firing Round No. 30 at 154 Mils Eleva-tion, 2040 Mils Left Traverse, Ascending a 150 Slope.
C -22
OC-C
s18-ool-580-T/ORD-63: Before Firing Round No. 35 at 445 Mils Eleva-
tion, 220 Mils Left Traverse, Descending a 150 Slope.
C-24
S18-OO1-579-T/ORD-63: After Firing Round No. 36 at 800 Mils Eleva-
tion, 2220 Mils Left Traverse, Descending a 15* Slope.
C -25
S18-001 587-T/ORD-63: After Firing Round No. 37 at 230 mils Eleva-tion, 2220 Mils Left Traverse on a 150 Right Side Slope.
S18-OO1-586-T/ORD-63: After Firing Round No. 38 at 178 Mils Eleva-
tion, 2040 Mils Left Traverse, on a 15o Right Side Slope.
0-27
slB-ool-564-T/ORD-063: After Firing Round No. 39 at 445 Mils Eleva-
tion 2040 Mils Left Traverse on a 150 Bight Side Slope.
C-28
S18-O0l-585-T/ORD-0"3: After Firing Round No. 40 at 665 Mils Eleva-
tion, 2040 Mils Left Traverse on a 150 Right Side Slope.
C -29
4 4
Al4
S18-001-591-T/ORD-63: Before Firing Found No. 41 at 255 Mils Eleva-tion, 620 M~ils Right Traverse, Ascending a 150 Slope.
C -30
S18-OO1-593-T/ORD-63 Before Firing Round No. 42 at 800 Mils El~eva-
tion, 620 Mils Right Traverse Ascending a 150 Slope.
C-31
a.
S18-OO1-590-T/OBD-0'3: Bef'ore Firing R~ound No. 43 at 178 Mils Eleva-tion, 620 Mils Rlight Traverse, Descending 150 Slope.,
C -32
S18-O01-592-T/ORD-063: Before Firing Round No. 45 at 178 Mils Eleva-tion, S20 Mils Right Traverse on a 150 Left Side Slope.
C-33
S18-OO1-569-T/ORD-b3: Before Firing Round No. 4S at 800 Mils Eleva-
tion, S20 Mils Right Traverse, on a 150 Left Side Slope.
C -34
S318-OO1-5924-T/OIRD-53: Before Firing Round No. 47 at 178 Mvils Eleva-tion, 62 Mils Right Traverse, on a 1c, Bight Side Slope.
C-35
.APPENDIX D
Firing Record
DEVELOPMENT AND PROOF SERVICESABERDEEN PROVING GROUND, MARYLAND
FIRING RECORD
Firings of XM29 Weapon System from Firing Record No.: M81845Truck, Utility, 1/4-Ton, 4x4, M151 Dates of Test: 21 to 29 January 1963
Authority: AOS 20 dated 3 August 1962AMCMS Code No. : 5560Q 12. 53307. O1.0O1
Production Engineering Test W. 0. No. 321-304-30 gjh
ITEM UNDER TEST
Recoilless gun, 155-umn, XM64E2, No. 154, mounted on truck,utility, 1/4-ton, 4x4, M151.
Mount, upper carriage, XM121E1, serial No. 190.Spotting gun, 37-mm, XM77E1, Nos. 13 and 26.
SUPPORTING FACILITIES AND MATERIALS
Ammunition:
Internal slugs, 155-nm (drawing No. FB 51480) with neoprene obturators.Propellant, M5, MP, 0.040-inch web, lot HPC-13245, loaded in phenolic
containers.Igniters, 4000-grain, Al black powder, with X275H electrical initiators.Projectiles, slug, 37-mm, inert, drawing No. AA-44-1726.Propellant, M5, SP, 0.021-inch web, lot RAD-SR-68A-60.Cartridge-case base assembly, XM415E6 and XM446E1.
Facilities:
Motion-picture cameras, 128 fps, used to obtain over-all views ofvehicular stability.
Still camera to obtain pictures before and after fire to depictvehicle damage.
DETAILS OF TEST
Details of test are contained in the body of Report No. DPS-911 towhich this firing record is appended.
ROUND-BY-ROUND DATA
Round-by-round data are contained in Inclosure 1.
D-1
FR No. M-818452
REMARKS
Spotting gun No. 13 was proof-fired and found acceptable.
This firing record forms a part of Report No. DPS-911.
SUBMI TTED:
fCapt;, Corps
REVIEWED: APPROVED:
AJF.ARRELL A. elActing Chief, Mortar Chief, Artilleryand Recoilless Rifle Branch Division
D-2
FR No. m.&842 5
'A ...... ..
A t ý1Cý11 C C H-!D 1 ý I . Ch 04 ý .4V O 1CJý zU, ,401
~I +
4 M4
0 SR. Cýc ý'
0 1 4O*o6JoCc -C t0OO'A 4O7jC-OOO'A OOLA _j*O
-- d.W-4\cd L-c.-4.-4dw
S0 ** 0~ Ncot'J 0ýý NA~cc 0-'0 e-.*, t- f0 0t'-InMCo COc C.* -M0 OAO MO0 0%eON CaA . - .4 .
a ~ ~ c a(- a- a ar aWI a a a a a a + a a a a ,~~~k~r At -O coic% * io
t~ ctct-**ýýCýCA o 0 0% 0 0 00 ,0 U NSAA W.ýOOU*0OOO00~OCO LOOOO
............................
C14~~ ~ ~ ~ M* af. t1 00 0% a.. Cga H444... a...;144Aý4 A, jm(nyACj I 7C
AAPAA ,%
Ino~si~r 1, ep 1D-3
PR~ No. M-818465
~ ~ ~4P,.4 4P
dU
. .+ 4+ .. . . CD (M t
II a
** 0*4*cJo CM 0', 40 *
-V~ 0 -tV '0 0I '0 0O* 0N40. N 10 .040 n 4 10 1
O; .0 0 4-4 0~ -. 0ý -t 0 Inf n -4
d~ctr-t o~~ '0AC500 'D U-O V; tz
-4, -4 -4-
O'ýR 0 "( 0 1^0 No m 0 r- '4'
r4r . . .1
N 0 0 4,nu%~ .4 4', 0 4
ix~ f94 j4 4-4: kII r- ;
x~~~~~ .4 s s- ,(1ý Nk 41
Page 2 A
APPENDIX E
Distribution
NO. OF NO. OFNAME AND ADDRESS COPIES NAME AND ADDRESS COPIES
Commanding General Commanding OfficerU. S. Army Materiel Command Picatinny ArsenalWashington 25, D. C. Dover, New Jersey 2ATTN: AMCRD-DE-MO 1
AMCRD-DE-W 1 Commanding OfficerAMCPP-MW 1 Frankford ArsenalAMCPM-DC, Maj Romaine 1 Philadelphia 37, Pa. 2
Commanding General Commanding OfficerU. S. Army Test and Watervliet ArsenalEvaluation Command Watervliet, New York 2
Aberdeen Proving Ground, Md.ATTN: AMSTE-TA Commanding Officer
AKSTE-BC Yuma Test StationCombat Development Command Yuma, Arizonac/o CDC Liaison Office ATTN: STEYT-TOE, Library 1Aberdeen Proving Ground, Md. 3 STEYT-TOE, Auto. 1
Commanding General Department of the NavyU. S. Army Supply and c/o Navy Liaison OfficeMaintenance Command Aberdeen Proving Ground, Md.
Washington 25, D. C.A2.TN: AMSSM-MR 1 Commanding Officer
Aberdeen Proving Ground, Md.Commanding General ATTN: STEAP-DS-D 1U. S. Army Weapon Command STEAP-TL 3Rock Island, IllinoisAT•N: AMCPM-DC, Lt Col 1 Commander
0. H. RoQgrs Armed Svcs Tech Inf AgencyArlington 12, Virginia
Commanding General ATTN: Document Svc Center 10U. S. Army Tank Auto. CenterDetroit ArsenalCenter Line, MichiganATTN: SMOTA-R 1
SMOTA -AL 1SMOTA-RES 1SMOTA-RRD.2 1SMOTA -REM 1SMOTA-IQK.3 2SMOTA-FMO 2SMOTA-REW 1SMOTA-REW.)1 1SMOTA-REC 2SMOTA-REV 1SMOTA-WS 1
E-1
AD Accession No.D&PS, Aberdeen Proving Ground, MarylandFINAL REPORT ON PRODUCTION ENGINEEINGTEST OF D49 WEAPON SYSTEM INSTALLED ONTRUCK, uTILITY, 1/4-TOx, 4X4, M151
J. DiBiase and Captain H. Killian
Report No. DPS-911, April 1963AMOS Code No. 5566. 12. 53307.01.01D. A. Proj No. IF-5-42718-D-383Unclassified Report
The XM29 weapon system, with a redesignedmounting kit, was installed on an M151 ve-hicle and given endurance and firing tests.Failures occurred on the right rear helpercoil spring (overload kit) and the generatorregulator. Firing limits which yield mini-mal blast dame were established. Severalmodifications are recommended.
AD Accession No.D&PS, Aberdeen Proving Ground, MarylandFINAL REPORT ON PRODUCTION ENGINEERI3TEST OF XM29 WEAPON SYST&D INSTALfLE ONTRUCK, UTILITY, l/4-TON, &X4, M151J. DiBiase and Captain H. Killian
Report No. DPS-911, April 1963AMCMS Code No. 5566.12. 53307.01.01D. A. Proj No. IF-5-42718-D-383Unclassified Report
The XM29 weapon system, with a redesignedmounting kit, was installed on an M151 ve-hicle and given endurance and firing tests.Failures occurred on the right rear helpercoil spring (overload kit) and the generatorregulator. Firing limits which yield mini-ral blast damage were established. Severalmodifications are recommended.
